Question

A car starting at 25 m/s applies its brakes, and 10 seconds later it slows down to a

velocity of 5 m/s. What is the acceleration of the car?

Answer 1

-2m/s²

Step-by-step explanation:

Given parameters:

Initial velocity of the car = 25m/s

Time taken = 10s

Final velocity = 5m/s

Unknown:

Acceleration of the car = ?

Solution:

Acceleration is the rate of change of velocity with time.

It is mathematically expressed as:

Acceleration =
`(Final velocity - Initial velocity)/(time)`

Acceleration =
`(5 - 25)/(10)` = -2m/s²